Xavier was said to have contradicted himself and failed to provide adequate context in which Mourinho's remarks were made, which was considered essential to establishing if the manager was guilty of the charge.

'The words mouthed were a Portuguese colloquial profanity.

The Chilean global was unhappy with manager, Jose Mourinho, after he was dropped earlier this season and reports claimed few weeks ago that the 29-year-old is considering leaving Old Trafford.

" In reply to the charge, JM served his own expert report from Simao Valente, an Assistant Professor at the University of Lisbon and an expert in the Portuguese language, including colloquialisms".

"Mourinho is sure to be asked about the FA's appeal after United face Juventus in the Champions League on Wednesday evening".

In their written reasons, the commission said: "We find that JM was celebrating victory without aiming the words at anyone in particular". His words were inaudible. Xavier said that he believed Mourinho twice said "Vós sois uns filhos da puta", which Xavier said translates to "sons of a whore" in English.

Mourinho accepted the words ascribed to him by the FA's expert witness, but claimed they were an "inwardly-directed expression of relief, happiness and determination".

Ultimately, the independent body ruled in favour of Mourinho, backing Valente's argument that "Even if the objective person was able to decipher the language [Mourinho] used, which is highly debatable, we accept Mr Valente's evidence that a typical person fluent in Portuguese colloquialisms would not feel insulted or offended from what they saw".

"We do not consider JM's language constituted abusive or insulting or improper act so on the balance of probabilities the charge is unanimously not proved".